From 12e25e281d69f11426d8d475e4128260467060da Mon Sep 17 00:00:00 2001
From: Darshan Sen <raisinten@gmail.com>
Date: Sat, 24 Apr 2021 20:16:42 +0530
Subject: [PATCH 1/3] async_hooks,doc: replace process.stdout.fd with 1

This stops "RangeError: Maximum call stack size exceeded".
---
 doc/api/async_hooks.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/api/async_hooks.md b/doc/api/async_hooks.md
index 6463527b598815..20553a241de5dd 100644
--- a/doc/api/async_hooks.md
+++ b/doc/api/async_hooks.md
@@ -275,7 +275,7 @@ async_hooks.createHook({
   init(asyncId, type, triggerAsyncId) {
     const eid = async_hooks.executionAsyncId();
     fs.writeSync(
-      process.stdout.fd,
+      1,
       `${type}(${asyncId}): trigger: ${triggerAsyncId} execution: ${eid}\n`);
   }
 }).enable();
@@ -328,7 +328,7 @@ async_hooks.createHook({
     const eid = async_hooks.executionAsyncId();
     const indentStr = ' '.repeat(indent);
     fs.writeSync(
-      process.stdout.fd,
+      1,
       `${indentStr}${type}(${asyncId}):` +
       ` trigger: ${triggerAsyncId} execution: ${eid}\n`);
   },

From 6a940bbfc2735400407cc9d6661e317237fb9233 Mon Sep 17 00:00:00 2001
From: Darshan Sen <raisinten@gmail.com>
Date: Sat, 24 Apr 2021 21:17:24 +0530
Subject: [PATCH 2/3] cache process.stdout.fd outside init

---
 doc/api/async_hooks.md | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/doc/api/async_hooks.md b/doc/api/async_hooks.md
index 20553a241de5dd..404c9691de248a 100644
--- a/doc/api/async_hooks.md
+++ b/doc/api/async_hooks.md
@@ -271,11 +271,16 @@ created, while `triggerAsyncId` shows *why* a resource was created.
 The following is a simple demonstration of `triggerAsyncId`:
 
 ```js
+const async_hooks = require('async_hooks');
+const fs = require('fs');
+
+const { fd } = process.stdout;
+
 async_hooks.createHook({
   init(asyncId, type, triggerAsyncId) {
     const eid = async_hooks.executionAsyncId();
     fs.writeSync(
-      1,
+      fd,
       `${type}(${asyncId}): trigger: ${triggerAsyncId} execution: ${eid}\n`);
   }
 }).enable();
@@ -322,29 +327,34 @@ callback to `listen()` will look like. The output formatting is slightly more
 elaborate to make calling context easier to see.
 
 ```js
+const async_hooks = require('async_hooks');
+const fs = require('fs');
+
+const { fd } = process.stdout;
+
 let indent = 0;
 async_hooks.createHook({
   init(asyncId, type, triggerAsyncId) {
     const eid = async_hooks.executionAsyncId();
     const indentStr = ' '.repeat(indent);
     fs.writeSync(
-      1,
+      fd,
       `${indentStr}${type}(${asyncId}):` +
       ` trigger: ${triggerAsyncId} execution: ${eid}\n`);
   },
   before(asyncId) {
     const indentStr = ' '.repeat(indent);
-    fs.writeSync(process.stdout.fd, `${indentStr}before:  ${asyncId}\n`);
+    fs.writeSync(fd, `${indentStr}before:  ${asyncId}\n`);
     indent += 2;
   },
   after(asyncId) {
     indent -= 2;
     const indentStr = ' '.repeat(indent);
-    fs.writeSync(process.stdout.fd, `${indentStr}after:  ${asyncId}\n`);
+    fs.writeSync(fd, `${indentStr}after:  ${asyncId}\n`);
   },
   destroy(asyncId) {
     const indentStr = ' '.repeat(indent);
-    fs.writeSync(process.stdout.fd, `${indentStr}destroy:  ${asyncId}\n`);
+    fs.writeSync(fd, `${indentStr}destroy:  ${asyncId}\n`);
   },
 }).enable();
 

From 4d4106cbe2007ef4a8e82df4eb8d703af0b41953 Mon Sep 17 00:00:00 2001
From: Darshan Sen <raisinten@gmail.com>
Date: Sun, 25 Apr 2021 19:16:56 +0530
Subject: [PATCH 3/3] directly use modules

---
 doc/api/async_hooks.md | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/doc/api/async_hooks.md b/doc/api/async_hooks.md
index 404c9691de248a..55cc0542561334 100644
--- a/doc/api/async_hooks.md
+++ b/doc/api/async_hooks.md
@@ -271,9 +271,6 @@ created, while `triggerAsyncId` shows *why* a resource was created.
 The following is a simple demonstration of `triggerAsyncId`:
 
 ```js
-const async_hooks = require('async_hooks');
-const fs = require('fs');
-
 const { fd } = process.stdout;
 
 async_hooks.createHook({
@@ -285,7 +282,7 @@ async_hooks.createHook({
   }
 }).enable();
 
-require('net').createServer((conn) => {}).listen(8080);
+net.createServer((conn) => {}).listen(8080);
 ```
 
 Output when hitting the server with `nc localhost 8080`:
@@ -327,9 +324,6 @@ callback to `listen()` will look like. The output formatting is slightly more
 elaborate to make calling context easier to see.
 
 ```js
-const async_hooks = require('async_hooks');
-const fs = require('fs');
-
 const { fd } = process.stdout;
 
 let indent = 0;
@@ -358,7 +352,7 @@ async_hooks.createHook({
   },
 }).enable();
 
-require('net').createServer(() => {}).listen(8080, () => {
+net.createServer(() => {}).listen(8080, () => {
   // Let's wait 10ms before logging the server started.
   setTimeout(() => {
     console.log('>>>', async_hooks.executionAsyncId());